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NFS timeout trying to copy large file



  i have an embedded system on which i can bring up a PPP connection
to a host running FC2T3 (yes, we'll upgrade to FC3 one of these days).

  currently, after we start the PPP connection, we can NFS mount a
directory from the host and copy a short file no problem ("short" =
184 bytes) from the host to the embedded system.

  however, copying a sizable file (600K) over the same PPP/NFS
combination fails -- the "cp" command sits there for several seconds,
and eventually, we get an NFS timeout error.

  here's the output from tcpdump on the ppp0 interface -- i'm not sure
what to make of the latter part of the output.  thoughts?

16:38:10.679007 IP 10.1.1.96.2590943354 > 10.1.1.97.nfs: 88 access [|nfs]
16:38:10.679169 IP 10.1.1.97.nfs > 10.1.1.96.2590943354: reply ok 120 access c 0000
16:38:10.759030 IP 10.1.1.96.2590943355 > 10.1.1.97.nfs: 100 getattr [|nfs]
16:38:10.759204 IP 10.1.1.97.nfs > 10.1.1.96.2590943355: reply ok 112 getattr REG 100644 ids 0/0 [|nfs]
16:38:10.837982 IP 10.1.1.96.2590943356 > 10.1.1.97.nfs: 88 access [|nfs]
16:38:10.838234 IP 10.1.1.97.nfs > 10.1.1.96.2590943356: reply ok 120 access c 0000
16:38:10.919969 IP 10.1.1.96.2590943357 > 10.1.1.97.nfs: 100 getattr [|nfs]
16:38:10.920227 IP 10.1.1.97.nfs > 10.1.1.96.2590943357: reply ok 112 getattr REG 100644 ids 0/0 [|nfs]
16:38:10.997223 IP 10.1.1.96.2590943358 > 10.1.1.97.nfs: 88 access [|nfs]
16:38:10.997416 IP 10.1.1.97.nfs > 10.1.1.96.2590943358: reply ok 120 access c 0000
16:38:11.078945 IP 10.1.1.96.2590943359 > 10.1.1.97.nfs: 100 getattr [|nfs]
16:38:11.079200 IP 10.1.1.97.nfs > 10.1.1.96.2590943359: reply ok 112 getattr REG 100644 ids 0/0 [|nfs]
16:38:11.158932 IP 10.1.1.96.2590943360 > 10.1.1.97.nfs: 104 access [|nfs]
16:38:11.159190 IP 10.1.1.97.nfs > 10.1.1.96.2590943360: reply ok 120 access c 0000
16:38:11.243980 IP 10.1.1.96.2590943361 > 10.1.1.97.nfs: 112 read [|nfs]
16:38:11.244317 IP 10.1.1.97.nfs > 10.1.1.96.2590943361: reply ok 520 read
16:38:11.244390 IP 10.1.1.97 > 10.1.1.96: udp
16:38:11.244408 IP 10.1.1.97 > 10.1.1.96: udp
16:38:11.443893 IP 10.1.1.97 > 10.1.1.96: udp
16:38:11.443920 IP 10.1.1.97 > 10.1.1.96: udp
16:38:11.643575 IP 10.1.1.97 > 10.1.1.96: udp
16:38:12.200775 IP 10.1.1.96.2590943361 > 10.1.1.97.nfs: 112 read [|nfs]
16:38:12.201133 IP 10.1.1.97.nfs > 10.1.1.96.2590943361: reply ok 520 read
16:38:12.201210 IP 10.1.1.97 > 10.1.1.96: udp
16:38:12.201229 IP 10.1.1.97 > 10.1.1.96: udp
16:38:12.400710 IP 10.1.1.97 > 10.1.1.96: udp
16:38:12.400738 IP 10.1.1.97 > 10.1.1.96: udp
16:38:12.600383 IP 10.1.1.97 > 10.1.1.96: udp
16:38:14.121482 IP 10.1.1.96.2590943361 > 10.1.1.97.nfs: 112 read [|nfs]
16:38:14.121750 IP 10.1.1.97.nfs > 10.1.1.96.2590943361: reply ok 520 read
16:38:14.121822 IP 10.1.1.97 > 10.1.1.96: udp
16:38:14.121840 IP 10.1.1.97 > 10.1.1.96: udp
16:38:14.321314 IP 10.1.1.97 > 10.1.1.96: udp
16:38:14.321342 IP 10.1.1.97 > 10.1.1.96: udp
16:38:14.520995 IP 10.1.1.97 > 10.1.1.96: udp
16:38:17.961900 IP 10.1.1.96.2590943361 > 10.1.1.97.nfs: 112 read [|nfs]
16:38:17.962172 IP 10.1.1.97.nfs > 10.1.1.96.2590943361: reply ok 520 read
16:38:17.962247 IP 10.1.1.97 > 10.1.1.96: udp
16:38:17.962265 IP 10.1.1.97 > 10.1.1.96: udp
16:38:18.161739 IP 10.1.1.97 > 10.1.1.96: udp
16:38:18.161766 IP 10.1.1.97 > 10.1.1.96: udp
16:38:18.361412 IP 10.1.1.97 > 10.1.1.96: udp



rday


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